How do I setup an email campaign to all of an accounts contacts?

In Sugar CE 6.5, How do I setup an email campaign to all of an accounts email contacts?  If I add an account to the campaign, for example one account has 50+ contacts in multiple locations and all are listed as contacts under the account, no emails went out?  Is ther an email canpaign setting that I missed?   How can I assign them to a target list?